FolderVisualizer: Where did my drive space go? FolderVisualizer allows you to easily find space wasting files and folders. The free application analyzes your disk drives and shows you exactly which files and folders need most space on your disk. FolderVisualizer finds space wasting files within seconds, shows statistics and charts about your disk drive and displays the top-100 files and types. FolderVisualizer also analyzes internal and external disk drives including USB sticks. As from version 2012: Automatic scan on all external hard drives which are connected with the PC plus a new function to delete files directly via right-click-menu from inside the program.